Pyrolysis and hydrocracking are commonly used to convert polymers such as polyethylene and polypropylene into fuels or waxy feedstocks. RenuMAT and SET groups at WRI also perform these processes. However, RenuMAT has developed technologies for selective chemical breakdown and modification of functionalized (PVC) or condensation-based (PET, nylon, polyeurethane, etc.) polymers to produce additives for asphalt markets. This breakdown and modification can be achieved with bio-based solvents and other solvents.